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The Effect of Acids and Alkalis on Bacterial GrowthFeatured science projectScience project video

Conclusion

he results of the experiment show that the hypothesis should be accepted. The higher the concentration of acid/alkali, the more bacteria it kills.
This experiment is useful because it tells us what conditions which are not suitable for bacteria survival. Scientists can develop alternative methods to eradicate harmful bacteria once they know about this experiment.

Also consider

Will all bacteria react the same way to acid and alkali?
What other methods are able to kill bacteria?
How can you minimize the effect of random error in this experiment?
The following bacteria types can be used as alternatives for this experiment:
-Clostridium Perdringens
-Clostridium Botulinum
-Mycobacterium Tuberculosis

References

http://en.wikipedia.org/wiki/Bacteria

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Complexity level:
7
Project cost ($):
20
Time required:
1 hour to prepare, 24 hours incubation period, 30 minutes to observe and record findings.
Material availability:
All materials should be provided by the biology laboratory. However, students should prepare their own goggles and lab coat.
Safety concerns:

Safety concerns: All biohazard material should be disposed into the sharps bin. Students must put on safety goggles and lab coat at all times throughout this experiment. Teachers must be on standby especially when students are removing the bacteria culture out of the bottle. Disinfectants must also be prepared in case of any bacteria culture spills.